Synthesis and characterization of eco-friendly mortars made with RHA-NaOH activated fly ash as binder at room temperature

Nemaleu, Juvenal Giogetti Deutou; Kaze, Cyriaque Rodrigue; Metekong, Jordan Valdès Sontia; Adesina, Adeyemi; Alomayri, Thamer; Stuer, Micheal; Kamseu, Elie

doi:10.1016/j.clema.2021.100010

Cited by 7 publications

(3 citation statements)

References 43 publications

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“…It can be seen that the porosity decreases with increasing rate of replacement of cement by rice husk ash up to 7.5%. This could be related to the fact that rice husk ash fills the voids in the mortar due to its fineness and the pozzolanic reaction [11] that it develops with lime to form silicates [12].…”

Section: Figure 3 Porosity Of Mortarsmentioning

confidence: 99%

“…The works of have shown that the use of sugarcane bagasse ash in cement matrix materials allows reducing the amount of cement [9] used in construction and in fact allows mitigating the environmental impact of cement production [2,10]. In addition, the ash of sugar cane bagasse allows the transformation of portlandite, weakness of the cementitious leg [9], in silicates that are elements of resistance [11,12] of materials.…”

Section: Introductionmentioning

confidence: 99%

“…From this work it is understood that incorporation of rice husk ash in mortar improves compressive strength [18][19][20], compactness [21] due to the reduction of porosity of the mortars when the rice husk ash is ground. Giogetti [11] and Bezerra [21] link these improvements in physical and mechanical properties to the development of silicates as a result of pozzolanic reactions. Also, we understand that incorporating rice husk ash into mortar reduces the thermal conductivity [22], sodium sulfide attacks [23] of the hardened mortar, and reduces the workability [12,24] of the fresh mortar.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the dynamic modulus of elasticity of a pozzolanic mortar of rice husk ash reinforced with sugarcane bagasse

DATCHOSSA¹,

DOKO²,

OLODO³

2023

World J. Adv. Res. Rev.

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In the last decades, many works are going in the direction of valorization of vegetable biomass. The aim of the present work is to determine the dynamic modulus of elasticity of a cementitious matrix composite with rice husk ash pozzolan reinforced with sugarcane bagasse. To do this, we formulated mortars in which we varied the volume fraction of sugarcane bagasse and kept 10% of rice husk ash as a cement replacement. The sugarcane bagasse fractions of 0%, 3%, 6% and 10% yielded the mortars denoted RHA10, R10SB3, R10SB6, R10SB10, respectively. We have experimentally determined the density, the porosity of the different mortars obtained. Then, we determined by ultrasound test the speed of propagation of sound waves in the different mortars before calculating their dynamic moduli of elasticity. The results of the study show that the porosity, density, and dynamic modulus of elasticity of RHA10 mortars decreases with the increase of the volume fraction of sugarcane bagasse. The dynamic moduli of RHA10, R10SB3, R10SB6 and R10SB10 are 3.25GPa, 3.14GPa, 2.56GPa, 1.71GPa respectively with a porosity-dynamic modulus correlation R² of 0.94.

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Section: Figure 3 Porosity Of Mortarsmentioning

confidence: 99%